JPH10141011A - Mounting method and mounting tool for high pressure turbine wheel chamber lower nut - Google Patents

Abstract

PROBLEM TO BE SOLVED: To relieve the burden of a worker and to shorten a working time. SOLUTION: The chain 3 of a winch 2 fixed at a winch mounting stand 1 is inserted through an upper nut 5, being a cap nut making contact with an upper half-wheel chamber 4, the heater insertion hole 7A of a wheel chamber fastening bolt 7 mounted in a screwed-in state on the upper nut 5 and protruded in a low half-wheel chamber 6, a lower nut 8, being a cap nut arranged below the wheel chamber fastening bolt 7, and a spring 9. A separation preventing member 10 to prevent separation of the spring 9 is fixed at the tip of the chain 3. A winch 2 is wound, the lower nut 8 is brought into contact with the wheel chamber fastening bolt 7, and by rotating the lower nut 8, mounting on the wheel chamber fastening bolt 7 is executed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a lower nut of a high-pressure turbine casing and a tool for mounting a lower nut of the high-pressure turbine casing.

[0002]

2. Description of the Related Art In a high-pressure turbine casing, an upper casing is overlapped with a lower casing, and a plurality of compartment fastening bolts having an upper nut mounted thereon are passed through the upper casing and the lower casing from above. It is formed by attaching a lower nut, which is a tightening nut, to the casing tightening bolt from below. As a method of attaching the lower nut, the worker lifts the lower nut directly from below, attaches it, the worker passes the chain from the top,
A method in which the lower worker fixes the chain to the lower nut, and then the upper worker lifts the lower nut manually and the lower worker attaches the lower nut. A method is known in which a chain block is attached to a vehicle and a lower nut is lifted by the chain block.

[0003] However, in this prior art, the method of lifting directly by the operator is such that the lower nut cannot be lifted continuously because the weight of one lower nut is as large as 45 kg at the maximum, and the lower nut is slightly raised. If it is displaced obliquely, the screws will not fit easily and the first tightening work of the casing tightening bottle and the lower nut will take time, the operator can not withstand the weight of the lower nut, lower it once, and after a short pause, There is a problem that it takes time because of the re-attachment.

Further, in the method using a chain, even when an upper person lifts the lower nut, the lower nut does not horizontally contact the cabin tightening bolt, and the force is unstable.
It takes a long time to install, it can not work continuously because it lifts the lower nut with a maximum of 45 kg by human power,
In addition, there is also a problem that the upper and lower persons are liable to suffer from low back pain, so that it is difficult to match the breathing of both persons.

[0005] The method of using a chain block requires assembling of a beam, so that it takes time to prepare the setting of the chain block. The position of the beam must be changed depending on the position of a cabin tightening bolt. In many cases, the center of the chain block does not coincide with the center of the cabin tightening bolt. The chain for lifting the upper nut is easily rubbed with the screw hole of the upper nut (for mounting the eyebolt for hanging). The chain block has a large lifting torque, so the torque adjustment is performed. It is very difficult to damage the thread of the vehicle interior tightening bolt. In any case, this conventional technique has a problem that a burden is imposed on a worker and a long time is required for the work.

The present invention has been made for the purpose of solving such a problem of the prior art.

[0007]

Means for solving the above problems will be described below with reference to FIG. 1 corresponding to an embodiment.
explain. According to the present invention, a chain 3 of a winch 2 fixed to a winch mount 1 is screwed to an upper nut 5 which is a cap nut in contact with an upper half compartment 4 and an upper nut 5 to be connected to a lower half compartment 6. The protruding heater insertion hole 7A of the cabin tightening bolt 7, the lower nut 8 which is a cap nut arranged below the cabin tightening bolt 7, and the spring 9 are inserted into the chain 3. The detachment preventing member 10 to be prevented is fixed, the winch 2 is wound, the lower nut 8 is applied to the cabin tightening bolt 7, and the lower nut 8 is turned to be attached to the cabin tightening bolt 7.

In the above-mentioned structure, the lower worker does not need to directly lift the lower nut 8 from below, so that the lower nut 8 does not swing through the chain 3 until the lower nut 8 hits the cabin tightening bolt 7. It only needs to be supported lightly, and when the lower nut 8 contacts the cabin tightening bolt 7, the level of the lower nut 8 is adjusted by the action of the spring 9, so that the squeezing work becomes easy.

[0009]

FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 1, 1 is a winch mount,
2 is a winch, 3 is a chain, 4 is an upper half compartment, 5 is an upper nut, 6 is a lower half compartment, 7 is a casing tightening bolt, 8 is a lower nut, 9 is a spring, and 10 is a detachment prevention member. .

The winch mount 1 comprises a vertical member 1A to which the winch 2 is fixed, and a horizontal member 1B connected to the vertical member 1A, and is placed on the upper nut 5 when the winch 2 is wound up. . Angle steel is used as the vertical member 1A and the horizontal member 1B, and their fixing is performed by welding. The total weight of the apparatus including the chain 3 wound around the winch 2 is as light as about 5 kg. Therefore, the movement and setting of the device are easy, and the burden on the upper worker is reduced.

The chain 3 mounted on the winch 2 may be a single chain as shown in FIG. 1, but as shown in FIG. 2, a vertical rotation separating means 3A may be provided at an intermediate portion of the chain 3. (Claim 4). In this way, when the lower nut 8 is turned, only the lower part of the chain 3 is rotated by the vertical rotation separating means 3A, the upper part of the chain 3 is not rotated, and the chain 3 is not twisted. Becomes easier. For example, a swivel with a snap is used as the vertical rotation separating unit 3A. The upper and lower portions of the chain 3 are easily connected by the hook portion of the swivel with snap.

As shown in FIG. 2, a round bar 3B is fixed to the end of the chain 3 by welding, and a screw 3C is formed at the end of the round bar B.

A lower nut 8 which is a cap nut is screwed onto an upper nut 5 which is a cap nut in contact with the upper half casing 4 and protrudes into the lower casing 6. First, the upper worker prepares the winch 2 fixed to the winch mount 1 in the upper half compartment 4. And
The upper worker pulls out the chain 3 from the winch 2 more than enough, and pulls the churn 3 into the heater insertion hole 5 of the upper nut 5.
A and the screw hole 5B and the heater insertion hole 7A of the vehicle interior tightening bolt 7 are put out into the lower half vehicle interior 6. Lower half room 6
The lower worker who has been waiting for the lower nut 8 is a lower nut 8 which is a cap nut disposed below the cabin tightening bolt 7.
Into the screw hole 8B and the heater insertion hole 8A, and
The lower nut 8 is inserted into a spring 9 having a diameter larger than the heater insertion hole 8 </ b> A, and a detachment preventing member 10 for preventing detachment of the spring 9 is fixed to the tip of the chain 3. As the detachment prevention member 10, a butterfly nut (claim 5) and a hexagon nut (claim 6) are used.

When the vertical rotation separating means 3A is used, the upper part and the lower part of the chain 3 are separated in advance. A spring 9 and a detachment preventing member 1 are provided below the chain 3.
0, and insert them into the lower nuts 8 respectively.
This may be followed by the vertical rotation separating speed 3A descending from above.

According to the signal of the lower worker, the upper worker places the winch mount 1 on the upper nut 5 and operates the handle 2A of the winch 2 to wind up the chain 3.
Pull up the lower nut 8. The fall of the lower nut 8 and the spring 9 is prevented by the detachment preventing member 10. The lower worker does not need to directly lift the lower nut 8 from below, but only needs to lightly support the lower nut 8 through the chain 3 so that the lower nut 8 does not swing until the lower nut 8 hits the cabin tightening bolt 7, and does not burden the worker. . The upper worker stops winding when he becomes heavier. In this case, the lower nut 8 is in contact with the lower end of the cabin tightening bolt 7,
Even if it is inclined, it becomes horizontal by the action of the spring 9, and when it is turned, it is screwed into the cabin tightening bolt 7 and attached. Further, when the lower nut 8 is turned while the winch 2 is being wound, the spring 9 adjusts the force applied to the lower nut 8, so that the nut can be easily turned. This also does not burden the operator. Since no burden is imposed on the worker in this way, the working time is reduced.

The above description is for the case in which the lower nut 8 is a cap nut, but in the case of a crown nut, the contact plate 11 that contacts the lower nut 8 is used (claim 2). The crown nut is different from the cap nut in that the heater insertion hole 8A
This is because the spring 9 cannot be used. As shown in FIG. 3, the contact plate 11 includes a disc 11A inserted into the lower nut 8 and a disc 11A.
A and fixed to the groove 8C of the lower nut 8
And the locking pieces 11B. A hole (not shown) for passing the chain 3 is formed in the center of the disk 11A.

Heater insertion hole 7A for cabin tightening bolt 7
Pipe 12 which is smaller and longer than lower nut 8
Is erected on the contact plate, that is, the disk 11A,
The chain 3 is passed through the pipe 12 (claim 3). By doing so, the position at which the lower nut 8 is lifted by the pipe 12 is raised, and the lower nut 8 is stabilized. Further, the pipe 12 is inserted into the heater insertion hole 7A, so that it functions as a guide, and the cabin tightening bolt 7 And the lower nut 8 are easily aligned.

The contact plate 11 is provided with the lower nut 8
Can also be used when the cap nut is used. In this case, the disk 11 </ b> A contacts the lower nut 8.

In the above description, the chain 3 is passed through the contact plate 11 alone or the pipe 12 and the contact plate 11, and the spring 9 and the separation preventing member 10 are attached to the lower portion of the chain 3. , Pipe 1
2 and may be fixed to one end of a shaft member 14 movably attached to the pipe 12 by a spring 13 mounted between the other end and the contact plate 11 (claim 7). The shaft member 14 is longer than the pipe 12 and has a hook 14A and a flange 1 larger than the diameter of the pipe 12 at one end.
4B has a flange 14C at the other end that is larger than the diameter of the pipe 12.
Are formed. By doing so, the shaft member 14 does not separate from the pipe 12, and when the tip of the chain 3 is connected to the hook portion 14 </ b> A, the chain 3 is integrated with the contact plate 11.

The vertical rotation separating means 3A is attached to the end of the chain 3.
The pipe 12 may be configured to be smaller than the heater insertion hole 7A of the cabin tightening bolt 7 and longer than the lower nut 8 (claim 8). ). In this way, when the lower nut 8 is turned, only the shaft member 14 is rotated by the vertical rotation separating means 3A, the chain 3 is not rotated, and the chain 3 is not twisted, and the handling of the chain 3 is easy. Become. For example, a swivel with a snap is used as the vertical rotation separating unit 3A. The hook portion of the swivel with snap facilitates connection with the shaft member 14. Also,
The position where the lower nut 8 is lifted by the pipe 12 is increased, the lower nut 8 is stabilized, and the pipe 12 is
Since it is inserted into the heater insertion hole 7A, it becomes a guide,
The cabin tightening bolt 7 and the lower nut 8 are easily aligned.

As shown in FIGS. 1, 2, and 3, the tool used for mounting the lower nut of the high-pressure turbine casing is a winch 2 fixed to a winch mounting table 1 and a tip of a chain 3 of the winch 2. It comprises a spring 9 having a diameter larger than the heater insertion hole 8A of the lower nut 8 inserted therein, and a detachment preventing member 10 for preventing detachment of the spring 9 fixed to the end of the chain 3 (claim 9). .
Or, the winch 2 fixed to the winch mount 1 and
A contact plate 11 which is inserted into the tip of the chain 3 of the winch 2 and which comes into contact with the lower nut 8; a spring 9 having a diameter larger than a chain insertion hole (not shown) of the contact plate 11; A detachment preventing member 10 for preventing detachment of the spring 9 fixed to the distal end (claim 10). Further, a pipe 12 which is smaller than the heater insertion hole 7A of the vehicle interior tightening bolt 7 and longer than the lower nut 8 is provided upright on the contact plate 11 (claim 11).

In these configurations, the winch mount 1
Comprises a vertical member 1A to which the winch 2 is fixed, and a horizontal member 1B connected to the vertical member 1A, and a vertical rotation separating means 3A is provided at an intermediate portion of the chain 3. ). Furthermore, at the tip of the chain 3,
As shown in FIG. 2, a round bar 3B is fixed by welding, and a screw portion 3C is formed at the tip of the round bar 3B. As the detachment preventing member 10, a butterfly nut (claim 13) or a hexagonal nut (claim 14) is used.

When these are used, the spring 9 and the separation preventing member 10 are detached from the chain 3, or if there is the vertical rotation separating means 3A, the vertical rotation separating means 3A
And remove the chain 3.

Further, as shown in FIG. 4, a tool used for mounting the lower nut of the high-pressure turbine casing is fixed to a winch 2 fixed to a winch mounting table 1 and a tip of a chain 3 of the winch 2. A shaft member inserted into a pipe 12 erected on a contact plate 11 abutting on the lower nut 8 and movably attached to the pipe 12 by a spring 13 mounted between the other end and the contact plate 11 14 (claim 15).

Further, the vertical rotation separating means 3A is attached to the tip of the chain 3, and this is fixed to the hook portion 14A of the shaft member 14. The pipe 12 is smaller than the heater insertion hole 7A of the cabin tightening bolt 7, and The lower nut 8 may be longer than the lower nut 8.

When using these, the shaft member 14 is detached from the chain 3 or, if there is the vertical rotation separating means 3A, the shaft member 14 is removed from the vertical rotation separating means 3A.

[0027]

As described above, the present invention provides:
A winch chain fixed to the winch mount is inserted into the upper nut, which is a cap nut in contact with the upper half compartment, and a heater fastening bolt of a casing fastening bolt screwed to the upper nut and projecting into the lower half compartment. Hole, a lower nut which is a cap nut arranged below the cabin tightening bolt, and a lower nut and a spring, and a detachment preventing member for preventing detachment of the spring is fixed to a tip of the chain, and the winch is wound.
The lower nut is applied to the cabin tightening bolt, and the lower nut is turned to be attached to the cabin tightening bolt. Therefore, the lower worker only needs to support the lower nut lightly so as not to swing until it hits the cabin tightening bolt.When the lower nut hits the cabin tightening bolt, the lower nut is level-adjusted by the action of the spring,
Saddle eye work becomes easy. Therefore, according to the present invention, the effect of reducing the burden on the worker and shortening the working time can be obtained.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view of a chain and the like constituting the present invention.

FIG. 3 is a perspective view of a contact plate constituting the present invention.

FIG. 4 is a perspective view of a shaft member and the like constituting the present invention.

[Explanation of symbols]

 Reference Signs List 1 winch mount 2 winch 3 chain 4 upper half compartment 5 upper nut 6 lower half compartment 7 casing tightening bolt 8 lower nut 9 spring 10 detachment prevention member 11 contact plate 12 pipe 13 spring 14 shaft member

Claims (16)

[Claims] 1. A winch chain fixed to a winch mount, an upper nut which is a cap nut in contact with an upper half casing, and a casing screwed to the upper nut and projecting into a lower half casing. A heater insertion hole of a tightening bolt, a lower nut which is a cap nut arranged below the cabin tightening bolt and a spring are inserted into the chain, and a detachment preventing member for preventing detachment of the spring is fixed to a tip of the chain, Winding the winch, applying the lower nut to the casing tightening bolt, and turning the lower nut to attach to the casing tightening bolt. 2. An upper nut which abuts a winch chain fixed to a winch mount to an upper half compartment, and a heater for a casing fastening bolt which is screwed to the upper nut and protrudes into a lower half compartment. An insertion hole, a lower nut arranged below the cabin tightening bolt, a contact plate and a spring that abuts the lower nut, are inserted into a spring, and at a tip of the chain,
A high-pressure turbine casing lower nut fixed to a detachment preventing member for preventing the spring from detaching, winding the winch, applying the lower nut to the casing tightening bolt, and turning the lower nut to attach to the casing tightening bolt How to attach 3. A pipe, which is smaller than the heater insertion hole of the cabin tightening bolt and is longer than the lower nut, is erected on the contact plate, and the chain is passed through the pipe.
How to install the lower nut of the high-pressure turbine casing described 4. A high-pressure turbine casing lower nut according to claim 1, wherein a lower part of the chain is rotated when the lower nut is turned by interposing a vertical rotation separating means in an intermediate part of the chain. Method 5. The detachment preventing member is a butterfly nut screwed onto a threaded portion formed at the end of the chain.
5. A method for mounting a lower nut of a high-pressure turbine casing according to claim 4. 6. The method for mounting a lower nut of a high-pressure turbine casing according to claim 1, wherein the detachment preventing member is a hexagonal nut screwed into a threaded portion formed at a tip of the chain. 7. A heater for an upper nut abutting the upper half compartment and a cabin tightening bolt screwed to the upper nut and projecting into the lower half compartment, the winch chain fixed to the winch mount. The chain is inserted into a lower nut disposed below the insertion hole and the vehicle compartment tightening bolt, and the end of the chain is inserted into a pipe standing on a contact plate abutting on the lower nut. It is fixed to one end of a shaft member movably attached to the pipe by a spring mounted between the contact plate, the winch is wound, the lower nut is applied to the casing tightening bolt, and the lower nut is turned. Method of attaching a high-pressure turbine casing lower nut to be attached to the casing tightening bolt 8. A vertical rotation separating means is attached to the end of the chain and is fixed to one end of the shaft member, and the pipe is made smaller than the heater insertion hole of the cabin tightening bolt and longer than the lower nut. A method for mounting a lower nut of a high-pressure turbine casing according to claim 7. 9. A winch fixed to a winch mount, a spring having a diameter larger than a heater insertion hole of a lower nut inserted into a tip of a chain of the winch,
A tool for mounting a high-pressure turbine casing lower nut, comprising a detachment preventing member for preventing detachment of the spring fixed to the end of the chain. 10. A winch fixed to a winch mounting base, a contact plate inserted into a tip of a chain of the winch, which contacts a lower nut, and a spring having a diameter larger than a chain insertion hole of the contact plate. A high-pressure turbine casing lower nut mounting tool, comprising: a detachment preventing member for preventing detachment of the spring fixed to the end of the chain. 11. The high-pressure turbine casing according to claim 10, wherein a pipe smaller than the heater insertion hole of the casing tightening bolt and longer than the lower nut is erected on the contact plate, and a chain is passed through the pipe. Lower nut installation tool 12. The high-pressure turbine casing lower nut installation tool according to claim 9, wherein a vertical rotation separating means is interposed at an intermediate portion of the winch chain, and only the lower portion of the chain is rotated. 13. The high-pressure turbine casing lower nut installation tool according to claim 9, wherein the detachment preventing member is a butterfly nut screwed into a threaded portion formed at the tip of the chain. 14. The detachment preventing member is a hexagon nut screwed onto a thread formed at the tip of the chain.
13. A tool for mounting a lower nut of a high-pressure turbine casing according to claim 12. 15. A winch fixed to a winch mounting base and a pipe fixed to the tip of a chain of the winch and erected on a contact plate abutting on a lower nut, the end being in contact with the other end. A high-pressure turbine casing lower nut mounting tool comprising a shaft member movably mounted on the pipe by a spring mounted between the plate and a plate. 16. A vertical rotation separating means is attached to a tip of a chain, and this is fixed to one end of a shaft member.
2. The pipe according to claim 1, wherein said pipe is smaller than a heater insertion hole of a cabin tightening bolt and longer than a lower nut.
5. A tool for mounting the lower nut of the high-pressure turbine casing described in 5